After Mosley was promoted to ‘super’ champion status by the WBA, Yuriy Nuzhnenko, the ‘interim’ titleholder, was stopped in the 11th round by Vyacheslav Senchenko at the Sports Palace, Donetsk, Ukraine on 10 April. In a battle between Ukranians, Senchenko would be seen as the new ‘second tier’ champion.

Later in the year, on 3 October at the Druzhba Sports Palace, Donetsk, Ukraine, Senchenko outpointed Motoki Sasaki over 12 rounds to retain the ‘second tier’ title.

After Mosley was beaten by Floyd Mayweather (l pts 12 on 1 May 2010 at the MGM Grand, Las Vegas, Nevada), in a fight at the welterweight limit, He was stripped of his ‘super’ champion title on 22 May and Senchenko was promoted to full championship status. The Mosley v Mayweather contest had gone ahead as a non-title fight after the latter refused to pay the sanctioning fee.